| Quartz variety | 14 |
| Quartz varieties | 16 |
| Quartz used in marbles | 22 |
| Quartz used in jewelry | 22 |
| Quartz type | 11 |
| Quartz source | 13 |
| Quartz playing marble | 21 |
| Quartz pieces | 13 |
| Quartz or flint | 15 |
| Quartz or feldspar | 18 |
| Quartz mineral | 14 |
| Quartz mined by Hudson and Gayle | 32 |
| Quartz material | 15 |
| Quartz marble | 13 |
| Quartz ingredient | 17 |
| Quartz gems | 11 |
| Quartz from volcanic rock | 25 |
| Quartz compound | 15 |
| Quartz component | 16 |
| Quartz | 6 |
| Quarts, overseas | 16 |
| Quarts successor | 16 |
| Quarts in a peck, e.g. | 22 |
| Quarto unit | 11 |
| Quartier d'__: July/August Parisian festival | 48 |
| Quartets times two | 18 |
| Quartets | 8 |
| Quartet, after a desertion | 26 |
| Quartet, after a defection | 26 |
| Quartet's makeup | 20 |
| Quartet x two | 13 |
| Quartet without strings | 23 |
| Quartet with one out sick? | 26 |
| Quartet with one out sick | 25 |
| Quartet with an absentee | 24 |
| Quartet with a defection | 24 |
| Quartet when one's out sick | 31 |
| Quartet voice | 13 |
| Quartet times two | 17 |
| Quartet that's into wine? | 29 |
| Quartet that's into a bit of granola? | 41 |
| Quartet that can't sing | 27 |
| Quartet that broke out in spring 1972, and the scheme of this puzzle's theme | 80 |
| Quartet strings | 15 |
| Quartet song subject | 20 |
| Quartet singer | 14 |
| Quartet quorum | 14 |
| Quartet plus quintet | 20 |
| Quartet part | 12 |
| Quartet on an online help page? | 31 |
| Quartet on a Quattro | 20 |
| Quartet on a baseball field | 27 |
| Quartet of storytellers? | 24 |
| Quartet of couch potatoes? | 26 |
| Quartet number | 14 |
| Quartet named for its singers | 29 |
| Quartet named for its members | 29 |
| Quartet minus two | 17 |
| Quartet minus one | 17 |
| Quartet members | 15 |
| Quartet member, often | 21 |
| Quartet member, maybe | 21 |
| Quartet member | 14 |
| Quartet in Mississippi? | 23 |
| Quartet in Mississippi | 22 |
| Quartet in a string quartet | 27 |
| Quartet in a George Strait title | 32 |
| Quartet in "One Sunday Afternoon" | 43 |
| Quartet in "No, No, Nanette" | 38 |
| Quartet in "Mississippi" | 34 |
| Quartet in "I Remember Mama" | 38 |
| Quartet in "cookbook" | 31 |
| Quartet in "A Midsummer-Night's Dream" | 52 |
| Quartet in "A Midsummer Night's Dream" | 52 |
| Quartet hidden in this puzzle | 29 |
| Quartet gave wit some fun | 25 |
| Quartet gal | 11 |
| Quartet from Mississippi | 24 |
| Quartet for first graders | 25 |
| Quartet following Q | 19 |
| Quartet favorite | 16 |
| Quartet doubled | 15 |
| Quartet crossing Abbey Road | 27 |
| Quartet count | 13 |
| Quartet by Haydn | 16 |
| Quartet before V | 16 |
| Quartet before S | 16 |
| Quartet at a major league game | 30 |
| Quartet after Q | 15 |
| Quartet after F | 15 |
| Quartet after E | 15 |
| Quartet after a desertion | 25 |
| Quartet after a defection | 25 |
| Quartet after a breakup? | 24 |
| Quartet | 7 |
| Quarters, perhaps | 17 |
| Quarters, informally | 20 |
| Quarters, e.g. | 14 |
| Quarters with buttons | 21 |
| Quarters with an espresso machine? | 34 |